Finding the Fourth Proportional to 12,442, 17,171.88 and 7,726.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,442 : 17,171.88 = 7,726.48 : x
2. Step 2: Convert to fraction form
   12,442/17,171.88 = 7,726.48/x
3. Step 3: Cross multiply
   12,442x = 17,171.88 × 7,726.48
4. Step 4: Simplify right side
   12,442x = 132,678,187.38
5. Step 5: Solve for x
   x = 132,678,187.38/12,442
6. Step 6: Final answer
   x = 10,663.73